These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/libxml-perl-0.80.0-r3::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 63 KiB
[ebuild  N     ] dev-perl/XML-Grove-0.460.0_rc-r2::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 27 KiB

Total: 2 packages (2 new), Size of downloads: 90 KiB